Improved sash-balance



ntrd ,gta/na PETER CHRISTIANSEN, OF'ROCI-IES'IER, MINNESOTA.

Lette/rs Patent No. 91,088, 'dated .Tune 8, 1869.

IMPROVED SASH-BALANCE.

The Schedule referred to in these Letters Patent and making part of thesame.

in the Mode of Hanging Window-Sashes; and I do hereby declare thefollowing to be a full, clear, and exact description of the saine,reference heilig had to the accompanying drawings, lnaking a part ofthis v specication,in which- Figure 1 is a front elevation.

Figure is a vertical central section on line a; a', fig. 1.

Figure 3 is afront view of the pulley, detached from the window-frame.

rlhe saine letters of reference, where employed in the drawings, de'noteidentical parts.

The nature of myA invention consists in the construction of a pulleysecured to the upper part of a window-frame.

The sheave of the pulley is provided with projections at its periphery,fitting into the links of a chain, which connects the upper and lowersashes.

A lever is pivoted to the pulley, and so constructed that it may serveto prevent the pulley from rotating, and thereby keep the sashcs(suspended by the chain passing round the sheave) in any desiredposition` To enable others skilled in the art to make anduse myinvention, I will proceed to describe its operation and construction.

A is a window-frame, and

B and C are the 'upper and lower sashes.

B and C are hooks or eyes, to which a chain, D, is fastened.

VThe chain passes over the sheave E, said sheave heilig attached to aframe or block, F, iirrnly secured to the upper part of frame A at A.

rlhe sheave E is provided with projections E at its periphery, fittinginto the'links of the chain l).

`A pin, F', projects horizontally from one ofthe sides of the block l",and a lever, G, is pivoted to thisA projeotion.

A spring, H, is fastened to the lower endof the lever G, bearing on theblock or fastening, Vand 'keeping the upper end of the lever G pressedagainst the pulley.

The lever is shaped somewhat like an S. Its upper part is prolonged, andextends horizontally'through an aperture ont for that purpose in theblock, and enters into a recess in the sheave E at E.

'lo the lower end of the lever G is attached a cord or chain, I,extending far enough downward to be reached with ease from within.

Vhen the operator pulls the cord or chain I,'the lever will assume aposition, as shown in red lines in fig. 3.

The upper part of the lever G will be drawn out of the recess in thesheave, and consequently allow the sheave to revolve.

By this operation, I may place the upper and lower sashes in any desiredposition, and independently of each other.

On the window-sill, I pivot a catch or lock, K, which,

when turned into a position at right angles with the sash, enters agroove, K', cut for that purpose in the lower sash. In such position itlocks the lower sash to the sill, and cannot be withdrawn but fromwithin..

Having thus described my invention,

What I claim, and desire to secure by Letters Pat- Witnesses:

T. SnnMANNs, vA. B. AMUNDSEN.

